Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3b4bdd7bd20fc5…

MALICIOUS

PDF

73.5 KB Created: 2021-01-17 03:50:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: de73f2b85c6ce7c6e90b4a5f2543de06 SHA-1: e9ffdf4380b366ae6116f977ba3806687e01fa2b SHA-256: ac3b4bdd7bd20fc523c14c8fcd8aaaa2bb605f50c3a52d69e0548b19e9d148e1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'screwdriver home depot' search term, indicating a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffi.ru/123?utm_term=right+angle+screwdriver+home+depot PDF link annotation
    • https://site-1178382.mozfiles.com/files/1178382/rap_music_video_with_ice_cream_truck.pdfIn PDF document text
    • https://site-1178979.mozfiles.com/files/1178979/wind_map_real_time.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/fhh6mjc/78717506686.pdfIn PDF document text
    • https://site-1177263.mozfiles.com/files/1177263/informatica_interview_questions_asked_in_capgemini.pdfIn PDF document text
    • https://site-1246605.mozfiles.com/files/1246605/aashiqui_2_movie_hd_photo.pdfIn PDF document text
    • https://site-1175983.mozfiles.com/files/1175983/39645500343.pdfIn PDF document text
    • https://site-1252378.mozfiles.com/files/1252378/fobufuxefuva.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/5832700243.pdfIn PDF document text
    • https://site-1171718.mozfiles.com/files/1171718/sobumututozobowe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dabatisew/bliss_kiss_nail_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/philips_air_fryer_manual_hd9220.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/kitufipobabikuli.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/gijabafo.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/excel_calendar_template_2018_free.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e29c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE29C 5648 bytes
SHA-256: e30a9efa394e2f92dade4662b988f28820af414c4e2a807819dc5cad4d996e48
font_01_sfnt_off0000f5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BF 10260 bytes
SHA-256: 7e229addc101f76bb90c7bc4155f11550ecf72f0e931c53cd39d011ccc507945

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